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  1. I just experimented with Fusion 360 after working with TurboCad Mac for a few years (the latest upgrade for TurboCad includes CAM, I understand; my version does not). Fusion is definitely more elegant and powerful. It is still not clear to me from the website that the free license is renewable, and so I am a little hesitant to invest a lot of time into creating models with this if it eventually goes away. It has extensive and free training videos. Mark
  2. Hi Paul, Now that is an interesting idea. The highest quality one would cost $26.40, maybe an interesting investment to see how it could turn out. I have heard that the best still have slight lines where the layers are formed, but cleaning up just one for a master would not be as dreary as cleaning up 74! I will reflect on whether this gives me anything better than just manually turning a master on the lathe, as I did before. Mark
  3. Thanks to the members on the CAD threads, I tried using Autodesk's Fusion 360 software to build a second version of the cannon, and it was very high quality; I also converted the earlier model with the insignia to the STL file type needed for 3-D printers, as shown below. But, it all came to nothing when I got the quote for 3-D printing at an online service. For the 74 guns it was going to be $556 for the lowest level of refinement, up to $1950 for the highest level of refinement. Way too much for a retirement budget, especially since I have been told that they will still show the layers as they build up. 3-D printing is no longer an option. On to other ideas. I realize that I was attracted to this because the digital model shows all of the wonderful, nuanced detail of the cannon itself, at a scale that looks real. But when this is shrunk down to 3/16" scale giving a 2" long cannon, most of the nuance disappears. I was disappointed to lose what I know should be there. Perhaps the best thing is to print out a large image of the digital cannon and pin it on the wall of my shop, to remind me what the model cannon represent! Mark
  4. SJSoane

    Fusion 360

    I played with Fusion this weekend, tried drawing my cannon project. It takes a little getting used to, but it did create a high quality model. Mark
  5. a little more research on STL files today, and I found a much finer setting. I put all setting at 0 except normal deviation which I put small at 2.25. Putting this at 0 really messes it up, for reasons I don't understand. But this file size is 24 MB. I will have to find out the max resolution for the printing company tomorrow. Mark
  6. SJSoane

    Fusion 360

    I just came across this thread while posting another topic in this area. After struggling with some of the idiosyncrasies of TurboCad for Mac, I am intrigued by the videos for Fusion 360 a number of you have pointed to. But I don't find on the Autodesk website how much the subscription is after the free trial period, for hobby use. Has anyone subscribed to this, and can you tell me how much it costs you? Mark
  7. Good suggestions. Here is a screen shot of the higher resolution file. Mark
  8. Nice, Alan, I upped the surface deviation from 0 to 45. Much better. Thanks for the suggestion! It turned into a 2.2 MB file, so too big to show here. Mark 32 gun for export deviation surface to 45.stl
  9. I just converted the file to STL, which is what Shapeways asked for. But it is quite faceted. Is this the best I can expect for a 3-D file? I saved it as a Binary file, although there was a choice for an ASCII file. There was also a choice for number of facets in the Binary option, I have shown the default that I chose. Apologies for the dumb questions; this is my first ever effort at 3-D printing, not quite sure where I am heading. Best wishes, Mark
  10. Thanks to great help from our colleagues on the CAD section including Alan, I managed to create the king's insignia in the digital file. I will try getting a 3-D print of this, just to see the quality. Although I have heard that 3-D printing is not quite up to snuff at this scale. And while waiting for that, I will continue with the duplicator... Mark
  11. Aha! Got it. Not quite sure how. I had to create a cover skin of the line drawing, then pull the skin into a solid, then subtract from it a female mould of the barrel shape + ¼" radius. Then add to the barrel. druxey, if I can figure out how to profile this with rounded edges, I will come out of retirement and start a CAD business!☺️ But thanks for the photo; it is great to see what we are trying to approximate here. Mark
  12. More work, it seems I have projected the walls, but not the top surface. At least I figured out how to make a female mould of the curve above the insignia, which I used to subtract from the top of the insignia. Now I just need to find out why I am not creating a top surface...
  13. Thanks, everyone, for these helpful suggestions. I am making a newbie mistake somewhere. However I try to extrude or project the insignia, I get an ill-formed solid, as seen below. Turbo Cad Mac is not very good at identifying the problem areas. When I first attempted to create a solid out of the line drawing, it said there are duplicated or overlapping curves and will not proceed. Unfortunately, sometimes it showed me where the offending problem is, sometimes not. I thought I had fixed them all when a tool like extrusion allowed me to proceed instead of calling an error. But when I proceed, I get these ill-formed solids. This image below is based on a drawing of control point splines. I have tried converting this drawing to interpolate splines, simple curves, etc. but the solid is still ill-formed. I will keep trying edits to see if I can at least get a clean solid from which to try the good suggestions above. I just wanted you all to know where I was with this.... Mark

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